Take a look at the boxart, special art book, and more for Zone of the Enders HD Collection Limited Edition, which seems to show that the Metal Gear Rising demo will be included on a separate disc on the Xbox 360.

Most companies these days forget that some people don't have an adequate connection/no connection to download demos. I like the old school demo approach with packing it with another game. It reminds me of how the first ZotE included a demo of MGS2. Good times.